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December 1936

ELECTRIC POTENTIALS OF THE BRAIN IN CERTAIN TYPES OF MENTAL DEFICIENCY

Author Affiliations

VINELAND, N. J.

From the Department of Research, the Training School at Vineland, N. J. Mr. George B. Thorn, Superintendent of the Vineland State School, permitted us to include in our series a number of the patients in that institution.

Arch NeurPsych. 1936;36(6):1206-1213. doi:10.1001/archneurpsyc.1936.02260120053003
Abstract

The present study was made to determine the properties of the electro-encephalogram associated with different types and levels of mental deficiency. This study was exploratory, its purpose being to determine the particular directions in which more detailed investigation would be desirable. The questions with which I was initially concerned are of two sorts: First, are there properties of the electro-encephalogram or of the cortical electrogram which characterize particular etiologic or clinical types of mental deficiency? Second, within any etiologic group what characteristics of the records, if any, vary with the intelligence level as measured in terms of Binet mental age? The types of mental deficiency which I shall consider here are the mongolian type and the so-called hereditary type. The selection of subjects as belonging to a group with a particular type of mental deficiency or level of intelligence is based on the examination of the psychologic and medical clinics

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